How prevalent do you think are children that live within wandering distance of a college that lets random children enter and use their computers?

Colleges with key punches? Probably pretty close to zero.

My point was more that, I think it's incorrect to assert that it's necessary for kids to directly use a computer in order to effectively learn about them. We have tons of concrete evidence of kids learning to be excellent at programming and understanding computers without directly using one. It happened with the kids I described.